"The Index Religiosus is an internationally renowned bibliography of academic publications in the fields of theology, religious sciences, and Church history. It is a gateway to books and articles written in major European languages (English, French, German, Italian, Spanish, Dutch, Portuguese, etc.). The bibliography stems from the fruitful collaboration between two institutions that are known for their expertise in the aforementioned domains - the Katholieke Universiteit Leuven (KU Leuven) and the Université Catholique de Louvain (UCL). The Index Religiosus brings together the Elenchus Bibliographicus (formerly published by the Ephemerides Theologicae Lovanienses) and the bibliography of the Revue d'Histoire Ecclésiastique. In combining and continuing these two bibliographies, the Index Religiosus is an indispensable instrument for scholars, the quality of which is improved daily thanks to an ongoing process of eliminating double records that resulted from merging the two bibliographies. Currently, the Index Religiosus counts more than 600,000 bibliographic records. Another 20,000 titles are added yearly, with updates applied every 3 months. Currently, the Index Religiosus counts more than 600,000 bibliographic records. Another 20,000 titles are added yearly, with updates applied every 3 months." --Coverage, viewed Apr. 27, 2020.